TY - RPRT TI - Can lay-led walking programmes increase physical activity in middle aged adults? A randomised controlled trial. AU - S E Lamb AU - H P Bartlett AU - A Ashley AU - W Bird PY - 2002 DO - 10.1136/jech.56.4.246 UR - https://pubmed.ncbi.nlm.nih.gov/11896130/ ID - 11896130 ER -